TotalCommander is a (shareware) PC program but does exist in a CE version.
It's very easy to copy/move files and also to zip/unzip.
TotalCommander has inbuild Notepad. You don't need to unzip files to make text changes, just press f4.
http://www.ghisler.com/
also:
http://handheld.softpedia.com/get/Desktop-and-Shell/Windows/Srego-ceCmd-Command-Window-37216.shtml